Universal drill jig



L.- LUlSl UNIVERSAL DRILL JIG prl 19, 1949.

Filed Jan. 15, 1946 5 Sheets-Sheet l INVENTOR. L a/j/ L z//.s/l

April 19, 1949. 1., 915| 9 2,467,396

UNIVERSAL DRILL JIG Filed Jan. 15. 1946 5 Sheets-Sheet 2 fx N a 1 l 9 QT* N) Q /N 9 /9 INVENTOR.

April 19, 1949. i L, LUIS; '2,467,396

UNIVERSAL DRILL J'IG Filed` Jan. 15K, 1946 5 ShebS-Sheet 5 INVENToR.

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pril 19, 1949.

Filed Jan. l5, 1946 l.. l-.Ulsrl UNIVERSAL DRILL JIG 5 Sheets-Sheet 4 INVENToR.

A Tram/5K April 19, 1949. L, LUIS, 2,467,396

UNIVERSAL DRILL JIG Filed Jan. 15. 1946 5 Sheets-Sheerl 5 `J/a Y 73 7/ 95 9/ I 44 42375' *mi 40 l 4l 74 n s2 5/ 7 77 50 liz 50 L HVENTOR. 5/ 5- 0/9/ a/.s/

A rfa/mfr Patented Apr. 19, 1949 NITED STATES PATENT OFFICESv 2,467,396` UNIVERSAL DRILL .11G Luigi Luisi, New York, N. Y.

Application January 15, 1946, Serial No. 641,371

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) 4 Claims.

rlhis invention relates to a universal drill jig for performing many types of precision drilling.

An object of this invention is to provide a jig in which the drill guide or bushing can be moved in three dimensions to accommodate a variety of Work.

Another object is to provide a jig that permits drilling of various types of material such as castings, round or flat stock, round bars, square bars and tubing.

Further objects and advantags of this invention, as well as its construction, arrangement and operation, will be apparent from the following description and claims in connection with the accompanying drawings, in which Fig. 1 is a front elevation of the drill jig.

Fig. 2 is a side elevation of the drill jig.

Fig. 3 is a top plan view of the drill jig, parts being broken away for clarity of illustration.

Fig. 4 is a vertical sectional view of the carriage along the line 4-4 of Fig. 3.

Fig. 5 is an isometric view of a clamp.

Fig. 6 is a top plan view of the base plate as used with clamps.

Fig. 7 is a side elevation of another type of clamp.

Fig. S is a front elevation of the clamp shown in Fig. 7.

Fig. 9 is a top plan view of the base plate as used with the clamps of Figs. '7 and 8.`

Fig. 10 is a top plan view of the base plate as used for radially spaced drilling.

Fig. 11 is a vertical sectional view of a lower stop taken along the line |I|I of Fig. 3.

Fig. 12 is a vertical sectional view of the carriage taken along the line |2|2 of Fig. 3.

The preferred embodiment of the invention is illustrated in Figs. 1, 2, and 3 wherein the base plate of the precision drill jig is designated by the numeral ID. The base plate lll is rectangular in shape and has diagonally cut therein slots of an inverted T-shape in cross section. Slots` l2, also of an inverted T-shape in cross section, are also cut in the base plate l0 parallelto the sides thereof and normal to each other.. Slots |2 connect the mid points of the sides of the base l0. At the intersection of the slots 2 is a bushing |3 which is welded to the base plate l0 or otherwise secured.

At the left side of base I0, as viewed in Fig. 3, are pairs of parallel cylindrical guide bars 20 received in the bores 2| in the base plate lll and held to the base plate I0 by means of screws 22.

The upper ends of the guide bars 2n are Lcon-v nected by cross pieces 2,3 which are fastened ytoV 2 the guide bars 20 by means of screws 24. Attached to the sides of cross pieces 23 are vertical bearing members 25 which mount a spindle 26 therebetween. On the inner sides of cross pieces 23 are vertical bearing members 21 which also support the spindle 26.

Slidably mounted upon the guide bars 2|! are vertically movable rail supports 28. Threadedly engaged with the rail supports 28 are lead screws 29 which are reduced in diameter, as at 3B, for reception in bores 3l in the base I0. Lead screws 29 also pass through threaded bores 32 and cross pieces 28, a collar 33 being provided on each lead screw 29 for proper positioning of the lead screw 29. Mounted on the spindle 26 and .on the top of lead screws 29 are beveled gears 34 which provide the drive for raising and lowering rail supports 28. A handle 35 is attached to one end of the spindle 26 for manual operation.

Extending between the two rail supports 28 is a pair of rails 4U and 4| attached to the rail supports 23 by means of screws 42. Rails 40 and 4| are beveled at their inner, upper corners, rail 4| being notched at its outer side, as at 43. The rail 40 at its outer side has a slot 44. Mounted upon the rails 40 and 4| and extending perpendicularly thereto is carriage 45 contoured to t the shape of the rails. Carriage 45 has an inwardly extending lip 46 which extends under the lip on the outer side of rail 4|, which lip is created by the notch 43. Carriage 45 has an inverted T-shaped slot 41 (Fig. 12). Mounted on the carriage 45 is an elongated member 48 of a general U-shape which is attached to the carriage 45 by means of screws 49. The elongated member 48 has lateral extensions 56 which are slotted at 5| to mount upper stops 90. Slidably mounted within the elongated member 48 is a slide 53.

Mounted in the bore of the slide 53 is an inverted bolt 6|, the upper end of which has a reduced diameter, as at 62, and which is held in place by means of a plate 63 attached to the slide 53 by means of screws 64, the head of the bolt 6| being received in the T slot 4'| and the carriage 45. An enlarged nut 65 is threadedly received by the bolt 62 and is used to clamp the slide 53 as desired with respect to the carriage `45 and velongated member 48. Locking of the carriage 45 along the rails 40 and 4| is achieved by means of an elongated setscrew 66 in the carriage 45 which impinges upon a small wear plate 61 which in turn is received bythe slot 44 in therail 40. Vertical movement of the sides of the rails 40 and 4| While vertical pieces 13 and 15 position the stops 1| by contact with the outer sides of the rails 40 and 4|. A bottom horizontal piece 16 straddles the lower side of the rails 40 and 4| and has a vertically extending piece 11 integral therewith which is received in a slot 18 of the vertical piece 14. A screw 19 is used to clamp the pieces 12 and 16 to the rails 40 and 4| as desired. Stops 1| are spaced as desired from the stops 80 which are integral with the carriage 45, spacing being regulated by means of accurately machined blocks as shown in phantom at 8| which t between the rails 40 and 4|, or by means of calipers, gauges, or other meansV for a purpose to be more fully described hereafter.

Within the slot of the elongated member 48 are mounted adjustable stops 90 (Fig. 12) each of which comprises an upper piece 9| having a reduced portion 92 snugly received within the slot 5| and a lower piece 93 which straddles the underside of the slot 5| and has a reduced portion 94 extending vertically into the slot 5|. Upper and lower pieces 9| and 93 are held together and clamped to the longated member 48 by means of screw 95. Upper stops 90 are spaced as required from the stop 96 which is integral with the plate 63, spacing being achieved by means of accurately machined blocks 8|, calipers, gauges, or other means for a purpose to be more fully described.

The drill bushing can be readily coaxially aligned with the bushing |3 of the base plate |0 by inserting a locating pin 91 (Fig. 4) into a bore 98 in the carriage 45 and also into a bore 99 in the rail 4|, bores 98 and 99 being located in the same vertical plane as the longer of the T slots |2 in the base I0 and in the same vertical plane as the axis of the bushing I3. Proper positioning of the slide 53 to make the bushing 10 coaxial with the bushing |3 is achieved by inserting a centering pin |00 into a bore |0|, extending half in the slide -53 and half in the elongated member 48. Checking of the coaxial relationship of the bushings 10 and |3 is achieved by means of pin |02 (Fig. 2) which can be passed through both bushings simultaneously.

Figs. 5 and 6 show the device in use for drilling round stock. For this operation clamps |03 in the shorter slot |2 are used. Each clamp |03 comprises a block |04 which has a notch |05 V-shape in cross section. Below block |04 is a guide rail |06 which is snugly received by the slot |2 in the base I0. Protruding lip |01 receives a nut |08 which in turn is held by the T slot |2, a screw |09 being used to x the clamp |03 as desired in the slot |2. A vertically adjustable member I0 of inverted L-shape is slidably received in a channel on one side of the block |04. The Lshaped member ||0 has a slot ||2 which rides on a screw ||3 which xes the position of the member |0 in height. Aset screw I4 is used to clamp the material in place. The notch |05 readily centers the round stock ||5 (shown in phantom) to be drilled. Byiinserting spacingY blocks 0| of the required number and size between the stops 1| and 80, the carriage can be successively moved along the rails 40 and 4| as desired, a block 8| equivalent to the spacing of the holes to be drilled being removed after each operation. Similarly, the slide 53 can be positioned by placing the required number of proper blocks 8| between the stops 96 and 90. Here, too. a block is required after each bore is drilled.

In drilling irregularly shaped castings, as at |20, L-shaped clamps ||6 xed in the T slots I2, as illustrated in Figs. '7, 8, and 9, are used to hold the work in position. When annular or circular work is to be drilled, a spindle |2| is inserted in the bushing |3 and a graduated plate |22 is mounted thereon. For large work, the spindle |2| can be mounted in a bore |23 (see Fig. 3). In the case of annular work a centering piece |24 can be mounted on the spindle |2 the centering piece |24 being accurately machined to snugly ilt the surface of a central bore in plate |22. Clamps |25 mounted in the tapped holes |26 can also be used to secure the work to the plate |22. For proper positioning of the plate |22 and the work thereon, latch |21 can be secured in the bores |28 (see Fig. 3). The bolts |29 of the latching devices are received by the notches corresponding to the graduations on the plate |22. These notches are too small to be seen in the drawings. When the plate |22 is mounted on the bore |23, latch |30 is used. A vernier |3| is mounted in one of the channels whenever it is desired to rotate the plate |22 an amount less than one degree. Since the latches |21 and |30 are aligned only for even degrees, clamps |32 are provided to hold the plate |22 securely when the vernier 3| is used, clamps |32 contacting a lip or rim |33 on the periphery of the plate 22. Tapped holes |26 are conveniently spaced on the disc |22 as required for the reception of clamping devices whenever the contour of the work so requires.

In the operation of the device, the work is clamped in position as illustrated in Figs. 6 and 9, or between clamps |25 of Fig. 10. The drill guide bushing 10 is accurately located over the Work by movement of the carriage 45 and the slide 53. Spacing blocks 0| are then placed between the stops and 1| and between the stops 96 and 90 as required. The carriage 45 and slide 53 are then clamped in place and the work drilled. By unclamping the carriage 45 and slide 53, the bushing 10 can then be moved parallel to the rails 40 and 4| or normal thereto after the requisite number of blocks 8| have been removed. Stops 80 and 96 are then made to contact the remaining block or blocks 8| and the carriage 45 and slide 53 are again clamped into position after which the next succeeding drilling operation is performed. This process is continued until the entire drilling operation is completed.

It is to be understood that smaller bushings may be received in the bushing 10 when small diameter drills are used.

Changes can be made in this invention without departing from the spirit and scope thereof as set forth in the appended claims.

The invention described herein may be `manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is:

l. A drill jig comprising a rectangular base.`

inverted yT-shaped slots in said base, said slots radiating from a central point, a bushing at said central point, pairs of spaced vertical cylindrical guides at one end of said base, each of said pairs slidably mounting a rail support, a pair of rails between said rail supports, a pair of lead screws mounted in said base and threadedly received one by each of said rail supports, a cross piece connecting each pair of said vertical guides, said lead screws passing each through one oi said cross pieces, bevel gears on each of said lead screws, bearings mounted on said cross pieces, a spindle in said bearings, bevel gears on said spindie meshing one with each of said iirst mentioned bevel gears, a handle on one end of said spindle, an elongated carriage on said rails, said carriage extending normal to said rails, adjustable stops on said rails on either side of said carriage, a setscrew in said carriage contacting one of said rails, said carriage having an inverted T slot therein, an elongated member on said carriage, said elongated memb-er being U-shaped in cross section, said elongated member having a lateral extension, said lateral extension having a slot, adjustable stops in said slot, an elongated slide within said carriage and elongated member, a drill guide in one end of said slide, a bolt in the T slot of said carriage, said bolt extending through said slide, a nut on said bolt, a stop on said slide, said stop extending over said lateral extension, a spindle in said bushing, a disc mounted on said spindle, said disc being graduated peripherally, clamps on said disc, clamps on said base in engagement with said disc, and a Vernier scale on said base for said disc.

2. A drill jig comprising a base, inverted T- shaped slots in said base, said slots radiating from a central point, pairs of spaced vertical guides at one end of said base, each of said pairs slidably mounting a rail support, a pair of rails between said rail supports, a pair of lead screws mounted in said base and threadedly received one by each of said rail supports, a cross piece connecting each pair of said vertical guides, said lead screws passing each through one of said cro-ss pieces, bevel gears on each of said lead screws, bearings mounted on said cross pieces, a spindle in said bearings, bevel gears on said spindle meshing one with each of said first mentioned bevel gears, a handle on one end of said spindle, an elongated carriage on said rails, said carriage extending normal to said rails, adjustable stops on said rails on either side of said carriage, a setscrew in said carriage contacting one of said rails, said carriage having an inverted T slot therein, an elongated member on said carriage, said elongated member being U-shaped in cross section, said elongated member having a lateral extension, said lateral extension having a slot, adjustable stops in said slot, an elongated slide within said carriage and elongated member, a drill guide in one end of said slide, a bolt in the T slot of said carriage, said bolt extending through said slide, a nut on said bolt, and a stop on said slide, said stop extending over said lateral extension.

3. A drill jig comprising a base, adjustable work-securing means on said base, pairs of spaced vertical guides at one end of said base, each of said pairs slidably mounting a rail support, a pair of rails between said rail supports, a pair of lead screws mounted in said base and threadedly received one by each of said rail supports, a cross piece connecting each pair of said vertical guides, said lead screws passing each through one of said cross pieces, bevel gears on each of said lead screws, a spindle mounted between said cross pieces, bevel gears on said spindle meshing one with each of said first mentioned bevel gears, a handle on one end of said spindle, a carriage on said rails, said carriage extending normal to said rails, adjustable stops on said rails on either side of said carriage, means for locking said carriage in selected position on said rails, said carriage having a U-shaped portion and la lateral extension, said lateral extension having a slot, adjustable stops in said slot, an elongated slide within said carriage, a drill guide in one end of said slide, and a stop in said slide, said stop extending over said lateral extension.

4. A drill jig comprising a base, adjustable work-securing means on said base, spaced vertical guides at one end of said base, each of said guides slidably mounting a rail support, a rail between said rail supports, lead screws mounted in said base and threadedly received by said rail supports, cross pieces connected with said vertical guides, `said lead screws passing through said cross pieces, gears on said lead screws, a spindle mounted between said cross pieces, gears on said spindle meshing with said rst mentioned gears, a handle on one end of said spindle, a carriage on said rail, said carriage extending to said rail, adjustable stops on said rail on either side of said carriage, means for locating said carriage in selected position on said rail, said carriage having a portion shaped to receive a slide and having a.

lateral portion, said lateral portion having stopsupporting means, adjustable stops on said stopsupporting means, an elongated slide on said carriage portion, a drill guide in one end of said slide, and stop means on said slide extending toward said last named adjustable stops.

LUIGI LU'ISI.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,258,137 Neth Mar. 5, 1918 1,335,347 Maulds Mar. 30, 1920 2,061,718 Stahl Nov. 24, 1936 2,338,530 Ognihene et al Jan. 4, 1944 2,383,201 Kruchten Aug. 21, 1945 2,407,769 Anderson Sept. 17, 1946 

